Load carrying bed with adjustable anchor

ABSTRACT

A device for mounting large heavy loads of various sizes to a loadbed. Two major anchoring members are slidably attached to a loadbed mounted rail member. One member prevents movement of the load transverse of the rail member and the other member, in conjunction with loadbed mounted slotted bar members located adjacent and parallel the rail member, prevents movement of the load longitudinal of the rail member.

PMENIEB MAY 1 (H975 SHEEI 10F 4 I LOAD CARRYING BED WITH ADJUSTABLEANCHOR BACKGROUND OF THE INVENTION This invention relates to a devicefor mounting large heavy loads of various sizes to a loadbed and moreparticularly to a device for mounting such loads to a loadbed that makesit unnecessary to modify loadbed structure for various size loads, oncethe device has been mounted to the loadbed.

When securing large heavy loads to a loadbed, especially when theloadbed is part of a transport vehicle, the usual practice is to custommake means for mounting such loads to the transport vehicle. One methodof securing a load, such as a power transformer, to a railcar type steelloadbed entails placing structural steel pieces around the periphery ofthe transformer base and then welding this structural steel to therailcar. The transformer is then bolted to the railcar by burning holesthrough the railcar floor to receive the bolts or by welding the boltheads to the railcar. All of this is extremely time-consuming andcostly. This attaching method is additionally undesirable due to thefact the welded structural steel must be removed from the railcar byflame cutting and the railcar floor must be restored to its originalcondition, as nearly as possible, by grinding the weld material aftereach shipment. When securing loads to wood-type railcars numerous holesare cut in the wood flooring of the railcar in order to fasten theseloads securely in place. This invention will drastically reduce thesecosts and extend the life of such railcars. Securing large heavy loadsto stationary loadbeds can create similar time-consuming and costly loadmounting and loadbed cleanup problems if the same load securing methodis used and the size and/or placement of such loads varies.

Accordingly, it is a principal object of my invention to provide adevice for mounting large heavy loads to a loadbed that makes itunnecessary to modify or otherwise degrade loadbed structure to attach aload thereto once the device has been mounted to the loadbed.

Another object of my invention is to provide a device for mounting largeheavy loads to a loadbed that is adjustable so that various size loadscan be accommodated by and anchored to the loadbed.

It is a further object of my invention to provide a device forexpeditiously mounting and demounting a large heavy load to and from aloadbed.

An additional object of my invention is to provide a device that willsignificantly lower the cost of mounting a large heavy load to aloadbed.

SUMMARY OF THE INVENTION An anchoring arrangement has been devised thatis capable of amply and expeditiously securing large heavy loads ofvarious sizes to a loadbed. The anchoring device comprises a railmember, which is permanently attached to the loadbed having two types ofclamping members called hold down and blocking members slidably attachedto the rail member. The hold down member is moved along the rail to thepoint where it: is coupled or can be attached to a load. A lockingdevice, such as a shim, is inserted tov prevent movement of the loadtransverse of the rail member. Bar members having regularly spacedopenings are fixedly attached to the loadbed parallel to and on bothsides of the rail member. The blocking member has regularly spacedprojections extending from it that mate with the regularly spacedopenings in the bar members. With the hold down member locked in place,the blocking member is moved as close as possible to the hold downmember while at the same time projections extending from the blockingmember are in meshing relationship with the regularly spaced projectionreceiving openings in the bar members. The blocking member is attachedto the hold down member and then the blocking member is locked in placewith respect to both the hold down member and the bar members. Theblocking member is then clamped to the rail member to prevent theregularly spaced projections extending from the blocking member frombecoming disengaged from the regularly spaced projection receivingopenings in the bar members. The blocking member now prevents movementof the load longitudinally of the rail member. The hold down andblocking members constitute a set and each load being attached to aloadbed requires two sets, one on a first side of the load and the otheron the side opposite this first side.

The invention which is sought to be protected will be particularlypointed out and distinctly claimed in the claims appended thereto.However, it is believed that this invention and the manner in which itsobjects and advantages are obtained, as well as other objects andadvantages thereof, will be more readily understood by reference to thefollowing detailed description of the preferred embodiment thereofparticularly when considered in light of the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of apreferred embodiment of the invention shown anchoring a load, with aT-bar structure extending therefrom, to a loadbed.

FIG. 2 is a plan view of a preferred embodiment of the hold down memberand T-bar structure of the present invention, shown partly in section.

FIG. 3 is a sectional view taken along the line 33 in FIG. 2.

FIG. 4 is a plan view of a railcar showing several hold down andblocking member sets of the subject invention, two sets of which aresecuring a transformer load, shown in phantom, to a railcar.

FIG. 5 is an enlarged view of the end portion of the bar members andstop block shown in FIG. 4.

FIG. 6 is a side elevation of the railcar transformer load andadjustable anchor in FIG. 4.

FIG. 7 is a sectional view taken along the line 7-7 in FIG. 1.

FIG. 8 is a sectional view taken along the line 8-8 in FIG. 7.

FIG. 9 is a sectional view taken along the line 9-9 in FIG. 7.

DESCRIPTION OF THE PREFERRED EMBODIMENT The anchoring function of thesubject invention is divided into two major parts. One part preventsmovement of the load in a plane or group of planes relative to a loadbedand the remaining part restrains movement of the load in a directiongenerally orthogonal to the plane or group of planes. Referring now tothe drawings and more particularly to FIG. I, there is shown theanchoring arrangement of the present invention that prevents both typesof movement. In this preferred embodiment the free end of the verticalportion of metal T-rail 12 is welded to metal railcar 14 such that theupper surface of T-rail 12 is generally parallel to the generallyhorizontal upper surface of railcar l4. Railcar 14 and the placement ofthe entire anchoring arrangement of the present invention is best seenin FIGS. 4 and 6. A T-bar 16 is inverted and the free end of thevertical portion of said T-bar 16 is welded to the base of transformer18. Hold down member 20 slidably engages of couples T-rail l2 and T-bar16. This sliding engagement or coupling arrangement is best shown inFIG. 3 which is a cross-sectional view of hold down member 20 takenalong the line 3-3 in FIG. 2. Referring now to FIG. 3 where hold downmember 20 is shown having two channel portions 22 and 24, one, 22, onthe bottomof the hold down member 20 and the other, 24, on the top ofsaid hold down member 20. Lip portions 25 of channel 22 overlap theundercut side portions 26 of T-rail 12 and are slidable with respectthereto. Lip portions 28 of channel 24 overlap the horizontal portion 30of T-bar 16 when said channel portion 24 of hold down 20 is slidablycoupled to said horizontal portion 30 of T-bar 16. Shims 32 are theninserted between the horizontal portion 30 of T-bar 16 and lips 28 ofchannel 24 to urge said load attached T-bar 16 toward said T-rail 12into an anchored position. Shims 32 also force hold down member 20upward and away from railcar 14 such that lips 25 of channel 22 engagethe undercut side portions 26 of T- rail 12. This arrangement locks load18 to railcar 14 which prevents movement of load 18 transverse of T-rail 12. 7

Referring again to FIG. 1 for a description of the remaining motionrestraining portion of the present invention where blocking member 34 isillustrated whose major function is to restrain movement of load 18 in adirection generally longitudinal of T-rail l2. Blocking member 34 has arectangular base plate 36 and a pair of rectangular side plates 38having the same length as base plate 36 fixedly attached at theirlargest surface area to opposite side edges 40, one plate per side edge,of said base plate 36. A pair of rectangular end plates 42 are fixedlyattached at their largest surface area to opposite end edges 44, oneplate per end edge, of said base plate 36 and to the ends 39. of saidrectangular side plates 38. End plates 42 extend beyond base plate 36and said side plates 38 and have slots 46 at each extending end of saidend plates 42, said slots being utilized when blocking member 34 isbolted to threaded boss members mounted on bracket 37 of hold downmember 20 (FIG. 2). Bar members 48 having regularly spaced opening 50are placed parallel and adjacent to T-rail l2 and are then welded to anupper surface of railcar 14. Side plates 38 have regularly spacedprojections 52 extending therefrom that are capable of meshing with,i.e. are complementary with, the regularly spaced projection receivingopenings 50 in bar members 48. Stop blocks 53 (FIG. 5) generallyrectangular in shape and having the same thickness as T-rail l2 and barmembers 48 have an edge, notched in two places to avoid interferringwith projections 52, are placed against the ends of T-rail 12 and barmembers 48 and: welded to an upper surface of railcar 14 to prevent-Referring now to FIG. 8, which is a cross-sectional view of one of apair of identically constructed clamping elements on opposite ends ofblocking member 34 taken along the line 8-8 in FIG. 7, where channeledshoe member 54 is shown having threaded bolt 56 inserted through beveledclearance hole 58 in channeled shoe member 54. The head 60 of said bolt56 is inserted through said clearance hole 58 to the point where saidbolt head 60 engages channeled shoe member 54 and is recessed below thesurface of channeled shoe member 54. Bolt head 60 is then welded tosaidchanneled shoe member 54. Channeled shoe member 54 has lip portions 62that overlap and slidably engage the undercut side portions 26 of T-rail12. This arrangement permits movement of channeled shoe member 54logitudinal of T-rail 12 but limits movement transverse of T-rail 12 bythe engagement of lip portions 62 of the channeled shoe member 54 withthe undercut side portions 26 of T-rail 12. Bolt 56 is inserted throughapertured cylindrical collar 64 in base plate 36 of blocking member 34.Cylindrically shaped spring 66 is assembled on blocking member 34concentric withbolt 56 such that one end of spring 66 engages seatportion 67 of apertured collar 64. Cylindrical cap 68, having aninternal diameter that is greater than the external diameter of collar64 is placed over collar 64 with bolt 56 passing through an aperture insaid cap 68 such that seat portion 70 of cap 68 engages the remainingend of spring 66. Washer 72 is placed over bolt 56 and then nut 74 isscrewed onto the threaded end of said bolt 56 and tightened until spring66 is compressed to a predetermined dimension, to produce a springpreload in proportion to the load to be secured. A hole is drilledthrough nut 74 and bolt 56 and then pin 88 is inserted into the drilledhole to prevent rotation of nut 74 with respect to bolt 56.

Referring now to FIG. 9 where the remaining type of blocking member 34mounted clamping element is illustrated. FIG. 9 is a cross-section viewtaken along the line 9-9 in FIG. 7. This remaining clamping element issimilar to that in FIG. 8 in that channel shoe member 54 as in FIG. 8,is bolted to blocking member 34 by threaded bolt 75 inserted throughbeveled clearance hole 76 in channel shoe member 54 to the point wherethe head 77 of said bolt 75 engages channeled shoe member 54 and isrecessed below the surface of shoe member 54 at which point said head 77is welded to said shoe member 54. A nipple 78 having internal andexternal threads and a movement restricting shoulder portion 80 at oneend is screwed onto bolt 75. The combination of nipple 78 and bolt 75 isinserted through a clearance hole in base plate 36 of blocking member 34such that said nipple 78 and the threaded endof bolt 75 extend in adirection opposite to that of the regularly spaced projections 52 onsideplates 38 of blocking member 34. Nut 82 is screwed onto and is.welded to nipple 78 such that channel shoe member 54 remains slidablewith respect ot T-rail 12.

To secure transformer 18 to a railcar 14 with the attaching arrangementof the preferred embodiment,

-, transformer l8, having a pair of Tbar members 16 atthose portions ofthe subject clamping device slidably engaging T-rail 12 from moving offthe ends of said T- rail 12. The meshing of side plates 38 with barmember tached to its base, is first placed'base downon top of railcarmounted T-rail 12 with vertical portions 17 of ability of space onrailcar Channel portions 24 of hold down members are moved along T-rail12 into full coupling engagement with T-bars 16, Shims 32 are blockingmember 34 is moved along T-rail 12 as close as possible to hold downmember 20 and still have the regularly spaced projections 52 on sideplates 38 of i hold down member 34 in meshing relationship with theregularly spaced openings 50 in bar members 48. Shim 84 (FIG. 1) havingspaced apart openings therethrough is then inserted between hold downmember 20 and blocking member 34. Bolts 86 are then inserted throughslots 46 on end plate 42 of blocking member 34 and then are turned intothreaded boss members 35 (FlG.2)' mounted on brackets 37 of hold downmember 20, when said threaded boss members 35 are aligned with said slotmembers 46 and the spaced apart openings in shim 84. The final step inanchoring transformer 18 to railcar 14 is to clamp the regularly spacedprojections 52 of hold down member 34 in the regularly spaced opening 50of bar member 48 in which they are so meshed. This is accomplished bytightening nipple/nut combination 78/82 (FIG. 9) on bolt 75. Prior tothis time, preloaded springs 66 (FIG. 8) located on opposite ends ofblocking member 34 assist in i I holding regularly spaced projections 52of hold down member 34 in the regularly spaced,,ppenings 50 of barmember 48. This is a failsafe feature which prevents the regularlyspaced projections 52 of hold down member 34 from becoming disengagedfrom the regularly spaced opening 50 in bar member 48 should nipple/nutcombination 78/82 (FIG. 9) loosen on bolt 75. Nut 82,

when tightened, forces lip 62 of shoe member 54 into nonslidingengagement with the undercut side portions 26 of T-rail 12. The forceexerted by lip 62 on said side portions 26 is reacted against hold downmember 34 which holds regularly spaced projections 52 of sideplate 38 intheir meshed position with regularly spaced openings 50 of bar member48. Bolts 86 are tightened to the point where relative motion betweenhold down member 20, blocking member 34 and bar member 48 logitudinallyof T-rail 12 is prevented.

GENERAL CONSIDERATIONS The preferred embodiment has been described interms of a load in the form of a transformer and a loadbed in the formof a railcar. This invention is not so limited in its application inthat it is possible to use this attaching arrangement with manydifferent types of loads and to attach these loads to both stationaryand other types of moveable loadbeds. Use of this device on a highwayvehicle such as a load transporting tractor/- trailer is within thescope of this invention.

When attachingthe hold down member 20 of the lsubjedt attaching deviceto the load to be secured to a within the scope of this invention.

What we claim as new and desire to secure by letters patent of US. is:

1. Apparatus for anchoring a load to a loadbed comprising:

a. a rail member fixedly attached to a loadbed;

b. a T-shaped structure formed of first and second plate-like portions,an edge of said first plate-like portion being attached to a face ofsaid second platelike portion intermediate of the ends of said secondplate-like portion such that said first and second plate-like portionsare in a generally or thogonal relationship, an edge of said firstplatelike portion opposite from the attached edge of said firstplate-like portion being attached to the base of said load;

c. a hold down member slidably attached to said rail member having aT-shaped upper channel portion extending in the direction of thelongitudinal axis of said rail member, engageable with said T-shapedload attached structure;

(1. a shim member insertable between the surface of said secondplate-like portion that is attached to an edge of said first plate-likeportion and an adjacent surface of said upper channel portion of saidhold down member, to urge said load attached T-shaped structure towardsaid rail member into an anchored position, and to urge said lip portionof the channeled bottom of said hold down member into nonslidingengagement with the undercut side portions of said rail member; and

e. means for preventing movement of said hold down member longitudinalof said rail member.

2. Apparatus for anchoring a load to a loadbed wherein the means forattaching and-locking said load to said hold down member and to saidrail member comprises:

a. a T-shaped structure formed of first and second plate-like portions,an edge of said first plate-like portion being attached generallyorthogonal to a surface of said second plate-like portion intermediateof the ends of said second plate-like portion, and an edge of said firstplate-like portion opposite from the attached edge of said firstplate-like portion being attached to the base of said load;

b. a hold down member slidably attached to said rail member having aT-shaped upper channel portion extending in the direction of thelongitudinal axis of said rail member, engageable with said T-shapedload attached structure;

c. a shim member insertable between the surface of said secondplate-like portion that is attached to an edge of said first plate-likeportion and an adjacent surface of said upper channel portion of saidhold down member, to urge said load attached T-shaped structure towardsaid rail member into an anchored position, and to urge said lip portionof said channel bottom of said hold down member into nonslidingengagement with the undercut side portions of said rail member.comprising:

a. a rail member fixedly attached to a loadbed;

b. a hold down member slidably attached to said rail member;

0. means for attaching said hold down member to said load;

(1. means for locking said hold down member to said load and to saidrail member to prevent movement of said load transverse of said railmember;

e. a blocking member having regularly spaced projections extendingtherefrom;

f. a bar member, having regularly spaced projection engaging openings,fixedly attached to said loadbed adjacent and parallel to said railmember;

g. means for attaching and locking said hold down member to saidblocking member and to said bar member once the regularly spacedprojections on said blocking member are in meshing relationship with theregularly spaced projection engaging opening on said bar member; and

b. means for clamping said blocking member to prevent the blockingmember projections meshed in said projection engaging openings in saidbar member from becoming disengaged from said projection engagingopening in said bar member.

3. Apparatus for anchoring a load to a loadbed comprising:

a. a rail member, having a top portion and having undercut sides,fixedly attached to said loadbed;

b. a hold down member, having a channeled bottom with lip portions,slidably engaging said undercut sides and said top portion of said railmember;

c. means for attaching said load to said hold down member;

d. means for locking said hold down member to said load and to said railmember to prevent motion of said load transverse of said rail member;

e. a blocking member having regularly spaced projections extendingtherefrom;

f. a bar member having regularly spaced projection engaging openings,fixedly attached to said loadbed adjacent and parallel to said railmember;

g. means for attaching and locking said hold down member to saidblocking member and to said bar member once the regularly spacedprojections on said blocking member are in meshing relationship with theregularly spaced projection engaging openings on said bar member; I

h. means for clamping said blocking member to prevent the blockingmember projections meshed in said projection engaging openings in saidbar member from becoming disengaged from the projection engagingopenings in said bar member.

4. Apparatus for anchoring a load to a loadbed as defined in claim 3wherein the means for attaching and locking said load to said hold downmember and to said rail member comprises:

a. a T-shaped structure formed of first and second plate-like portions,an edge of said first plate-like portion being attached generallyorthogonal to a surface of said second plate-like portion intermediateof the ends of said second plate-like portion, and an edge of said firstplate-like portion opposite from the attached edge of said firstplate-like portion being attached to the base of said load;

b. a hold down member slidably attached to said rail member having aT-shaped upper channel portion extending in the direction of thelongitudinal axis of said rail member, engageable with said T-shapedload attached structure; and

c. a shim member insertable between the surface of said secondplate-like portion that is attached to an edge of said first plate-likeportion and an adjacent surface of said upper channel portion of saidhold down member, to urge said load attached T-shaped structure towardsaid rail member into an anchored 5 position and to urge said lipportion of said channeled bottom of said hold down member intononsliding engagement with the undercut side portions of said railmember.

5. Apparatus for anchoring a load to a loadbed as defined in claim 3wherein the means for attaching and locking said hold down member tosaid blocking member and to said loadbed attached bar member comprises:

a. a bracket member fixedly attached to an end of said hold down member,having a threaded opening extending therethrough;

b. an end plate member fixedly attached to an end of said blockingmember, havingopenings extending therethrough and having the blockingmember mounted end plate member locate adjacent said threaded opening insaid hold down member mounted bracket member; j

c. a shim member insertable between a hold down member mounted bracketmember and a blocking member mounted end plate member having openingsthrough said shim member that are in the same spatial relation asopening in said bracket member and said end plate member; and

d. a bolt insertable through an opening in said end plate member andsaid shim member having a threaded end portion, said bolt beingscrewable into the threaded opening in said bracket member to attach andlock said hold down member to said blocking member and to said loadbedattached bar member.

6. Apparatus for anchoring a load to a loadbed as defined in claim 3wherein the means for clamping said blocking member in said bar membercomprises:

a. a channeled shoe member slidably engaging said rail member;

b. a threaded bolt-like member having one end of said bolt-like memberfixedly attached to said channeled shoe member and having the threadedend of said bolt-like member insertable through an opening in saidblocking member; and

0. means for urging said bolt-like member through said opening in saidblocking member and applying a force to said blocking member and saidchanneled shoe member sufficient to keep said regularly spacedprojections extending from said blocking member firmly clamped in saidprojection engaging openings in said bar member and to urge saidchanneled shoe member into nonsliding engagement with said rail member.

7. Apparatus for anchoring a load to a loadbed as defined in claim 6wherein the means for urging said boltlike member through said openingcomprises:

a. two outer and one inner of said bolt-like members longitudinallyspaced on said channeled shoe member;

b. a cylindrical spring assembled concentrically on the said two outerbolt-like members after said two outer bolt-like. member having beeninserted through longitudinally spaced openings in said blocking membersuch that one end of said spring engages said blocking member;

c. an apertured spring seat assembled on said two outer bolt-likemembers such that the threaded end of said outer bolt-like member passesthrough the aperture in said spring seat and said spring seat engagesthe remaining end of said cylindrical spring;

d. an internally threaded nut screwable on said two outer bolt-likemembers to the point where said threaded nut engages said spring seatand transmits the desired force through said spring to said blockingmember; and

e. a nipple having internal and external threads and having a movementrestricting shoulder portion on with said rail member.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PATENT NO.3,883,107

Otis W. Ashworth and Gordon C. Holden INVENTOR(S) 1 It is certified thaterror appears in the above-identified patent and that said LettersPatent are hereby corrected as shown below:

C01. 4, line 39, change "section" to sectional C01. 4, line 59, change"0t" to to C01. 6, lines 34 et seq. delete lines 34 0 except for word'comprising in line 60 Signed and Sealed this twenty-third D ay OfDecember I 9 75 [SEAL] A ttes t:

RUTH c. MASON c. MARSHALL DANN A IP II'HR ffi Commissioner oj'Parenlsand Trademarks

1. Apparatus for anchoring a load to a loadbed comprising: a. a railmember fixedly attached to a loadbed; b. a T-shaped structure formed offirst and second plate-like portions, an edge of said first plate-likeportion being attached to a face of said second plate-like portionintermediate of the ends of said second plate-like portion such thatsaid first and second plate-like portions are in a generally orthogonalrelationship, an edge of said first platelike portion opposite from theattached edge of said first plate-like portion being attached to thebase of said load; c. a hold down member slidably attached to said railmember having a T-shaped upper channel portion extending in thedirection of the longitudinal axis of said rail member, engageable withsaid T-shaped load attached structure; d. a shim member insertablebetween the surface of said second plate-like portion that is attachedto an edge of said first plate-like portion and an adjacent surface ofsaid upper channel portion of said hold down member, to urge said loadattached T-shaped structure toward said rail member into an anchoredposition, and to urge said lip portion of the channeled bottom of saidhold down member into non-sliding engagement with the undercut sideportions of said rail member; and e. means for preventing movement ofsaid hold down member longitudinal of said rail member.
 2. Apparatus foranchoring a load to a loadbed wherein the means for attaching andlocking said load to said hold down member and to said rail membercomprises: a. a T-shaped structure formed of first and second plate-likeportions, an edge of said first pLate-like portion being attachedgenerally orthogonal to a surface of said second plate-like portionintermediate of the ends of said second plate-like portion, and an edgeof said first plate-like portion opposite from the attached edge of saidfirst plate-like portion being attached to the base of said load; b. ahold down member slidably attached to said rail member having a T-shapedupper channel portion extending in the direction of the longitudinalaxis of said rail member, engageable with said T-shaped load attachedstructure; c. a shim member insertable between the surface of saidsecond plate-like portion that is attached to an edge of said firstplate-like portion and an adjacent surface of said upper channel portionof said hold down member, to urge said load attached T-shaped structuretoward said rail member into an anchored position, and to urge said lipportion of said channel bottom of said hold down member into non-slidingengagement with the undercut side portions of said rail member.comprising: a. a rail member fixedly attached to a loadbed; b. a holddown member slidably attached to said rail member; c. means forattaching said hold down member to said load; d. means for locking saidhold down member to said load and to said rail member to preventmovement of said load transverse of said rail member; e. a blockingmember having regularly spaced projections extending therefrom; f. a barmember, having regularly spaced projection engaging openings, fixedlyattached to said loadbed adjacent and parallel to said rail member; g.means for attaching and locking said hold down member to said blockingmember and to said bar member once the regularly spaced projections onsaid blocking member are in meshing relationship with the regularlyspaced projection engaging opening on said bar member; and h. means forclamping said blocking member to prevent the blocking member projectionsmeshed in said projection engaging openings in said bar member frombecoming disengaged from said projection engaging opening in said barmember.
 3. Apparatus for anchoring a load to a loadbed comprising: a. arail member, having a top portion and having undercut sides, fixedlyattached to said loadbed; b. a hold down member, having a channeledbottom with lip portions, slidably engaging said undercut sides and saidtop portion of said rail member; c. means for attaching said load tosaid hold down member; d. means for locking said hold down member tosaid load and to said rail member to prevent motion of said loadtransverse of said rail member; e. a blocking member having regularlyspaced projections extending therefrom; f. a bar member having regularlyspaced projection engaging openings, fixedly attached to said loadbedadjacent and parallel to said rail member; g. means for attaching andlocking said hold down member to said blocking member and to said barmember once the regularly spaced projections on said blocking member arein meshing relationship with the regularly spaced projection engagingopenings on said bar member; h. means for clamping said blocking memberto prevent the blocking member projections meshed in said projectionengaging openings in said bar member from becoming disengaged from theprojection engaging openings in said bar member.
 4. Apparatus foranchoring a load to a loadbed as defined in claim 3 wherein the meansfor attaching and locking said load to said hold down member and to saidrail member comprises: a. a T-shaped structure formed of first andsecond plate-like portions, an edge of said first plate-like portionbeing attached generally orthogonal to a surface of said secondplate-like portion intermediate of the ends of said second plate-likeportion, and an edge of said first plate-like portion opposite from theattached edge of said first plate-like portion being attached to thebase of said load; b. a hold down member slidably aTtached to said railmember having a T-shaped upper channel portion extending in thedirection of the longitudinal axis of said rail member, engageable withsaid T-shaped load attached structure; and c. a shim member insertablebetween the surface of said second plate-like portion that is attachedto an edge of said first plate-like portion and an adjacent surface ofsaid upper channel portion of said hold down member, to urge said loadattached T-shaped structure toward said rail member into an anchoredposition and to urge said lip portion of said channeled bottom of saidhold down member into nonsliding engagement with the undercut sideportions of said rail member.
 5. Apparatus for anchoring a load to aloadbed as defined in claim 3 wherein the means for attaching andlocking said hold down member to said blocking member and to saidloadbed attached bar member comprises: a. a bracket member fixedlyattached to an end of said hold down member, having a threaded openingextending therethrough; b. an end plate member fixedly attached to anend of said blocking member, having openings extending therethrough andhaving the blocking member mounted end plate member locate adjacent saidthreaded opening in said hold down member mounted bracket member; c. ashim member insertable between a hold down member mounted bracket memberand a blocking member mounted end plate member having openings throughsaid shim member that are in the same spatial relation as opening insaid bracket member and said end plate member; and d. a bolt insertablethrough an opening in said end plate member and said shim member havinga threaded end portion, said bolt being screwable into the threadedopening in said bracket member to attach and lock said hold down memberto said blocking member and to said loadbed attached bar member. 6.Apparatus for anchoring a load to a loadbed as defined in claim 3wherein the means for clamping said blocking member in said bar membercomprises: a. a channeled shoe member slidably engaging said railmember; b. a threaded bolt-like member having one end of said bolt-likemember fixedly attached to said channeled shoe member and having thethreaded end of said bolt-like member insertable through an opening insaid blocking member; and c. means for urging said bolt-like memberthrough said opening in said blocking member and applying a force tosaid blocking member and said channeled shoe member sufficient to keepsaid regularly spaced projections extending from said blocking memberfirmly clamped in said projection engaging openings in said bar memberand to urge said channeled shoe member into nonsliding engagement withsaid rail member.
 7. Apparatus for anchoring a load to a loadbed asdefined in claim 6 wherein the means for urging said bolt-like memberthrough said opening comprises: a. two outer and one inner of saidbolt-like members longitudinally spaced on said channeled shoe member;b. a cylindrical spring assembled concentrically on the said two outerbolt-like members after said two outer bolt-like member having beeninserted through longitudinally spaced openings in said blocking membersuch that one end of said spring engages said blocking member; c. anapertured spring seat assembled on said two outer bolt-like members suchthat the threaded end of said outer bolt-like member passes through theaperture in said spring seat and said spring seat engages the remainingend of said cylindrical spring; d. an internally threaded nut screwableon said two outer bolt-like members to the point where said threaded nutengages said spring seat and transmits the desired force through saidspring to said blocking member; and e. a nipple having internal andexternal threads and having a movement restricting shoulder portion onone end insertable through an opening in said blocking member and a nutthat has been screwed onto the external threads and fixedly attached tosaid nipple having the inTernal threads of said nipple screwed onto thethreaded end of said inner boltlike member sufficient to keep saidregularly spaced projections extending from said blocking member firmlyclamped in said projection engaging openings in said bar member and tourge said channeled shoe member into nonsliding engagement with saidrail member.